//! moment.js
//! version : 2.5.1
//! authors : Tim Wood, Iskren Chernev, Moment.js contributors
//! license : MIT
//! momentjs.com

(function (undefined) {

  /************************************
   Constants
   ************************************/

  var moment,
    VERSION = "2.5.1",
    global = this,
    round = Math.round,
    i,

    YEAR = 0,
    MONTH = 1,
    DATE = 2,
    HOUR = 3,
    MINUTE = 4,
    SECOND = 5,
    MILLISECOND = 6,

    // internal storage for language config files
    languages = {},

    // moment internal properties
    momentProperties = {
      _isAMomentObject: null,
      _i: null,
      _f: null,
      _l: null,
      _strict: null,
      _isUTC: null,
      _offset: null,  // optional. Combine with _isUTC
      _pf: null,
      _lang: null  // optional
    },

    // check for nodeJS
    hasModule = (typeof module !== 'undefined' && module.exports && typeof require !== 'undefined'),

    // ASP.NET json date format regex
    aspNetJsonRegex = /^\/?Date\((\-?\d+)/i,
    aspNetTimeSpanJsonRegex = /(\-)?(?:(\d*)\.)?(\d+)\:(\d+)(?:\:(\d+)\.?(\d{3})?)?/,

    // from http://docs.closure-library.googlecode.com/git/closure_goog_date_date.js.source.html
    // somewhat more in line with 4.4.3.2 2004 spec, but allows decimal anywhere
    isoDurationRegex = /^(-)?P(?:(?:([0-9,.]*)Y)?(?:([0-9,.]*)M)?(?:([0-9,.]*)D)?(?:T(?:([0-9,.]*)H)?(?:([0-9,.]*)M)?(?:([0-9,.]*)S)?)?|([0-9,.]*)W)$/,

    // format tokens
    formattingTokens = /(\[[^\[]*\])|(\\)?(Mo|MM?M?M?|Do|DDDo|DD?D?D?|ddd?d?|do?|w[o|w]?|W[o|W]?|YYYYYY|YYYYY|YYYY|YY|gg(ggg?)?|GG(GGG?)?|e|E|a|A|hh?|HH?|mm?|ss?|S{1,4}|X|zz?|ZZ?|.)/g,
    localFormattingTokens = /(\[[^\[]*\])|(\\)?(LT|LL?L?L?|l{1,4})/g,

    // parsing token regexes
    parseTokenOneOrTwoDigits = /\d\d?/, // 0 - 99
    parseTokenOneToThreeDigits = /\d{1,3}/, // 0 - 999
    parseTokenOneToFourDigits = /\d{1,4}/, // 0 - 9999
    parseTokenOneToSixDigits = /[+\-]?\d{1,6}/, // -999,999 - 999,999
    parseTokenDigits = /\d+/, // nonzero number of digits
    parseTokenWord = /[0-9]*['a-z\u00A0-\u05FF\u0700-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]+|[\u0600-\u06FF\/]+(\s*?[\u0600-\u06FF]+){1,2}/i, // any word (or two) characters or numbers including two/three word month in arabic.
    parseTokenTimezone = /Z|[\+\-]\d\d:?\d\d/gi, // +00:00 -00:00 +0000 -0000 or Z
    parseTokenT = /T/i, // T (ISO separator)
    parseTokenTimestampMs = /[\+\-]?\d+(\.\d{1,3})?/, // 123456789 123456789.123

    //strict parsing regexes
    parseTokenOneDigit = /\d/, // 0 - 9
    parseTokenTwoDigits = /\d\d/, // 00 - 99
    parseTokenThreeDigits = /\d{3}/, // 000 - 999
    parseTokenFourDigits = /\d{4}/, // 0000 - 9999
    parseTokenSixDigits = /[+-]?\d{6}/, // -999,999 - 999,999
    parseTokenSignedNumber = /[+-]?\d+/, // -inf - inf

    // iso 8601 regex
    // 0000-00-00 0000-W00 or 0000-W00-0 + T + 00 or 00:00 or 00:00:00 or 00:00:00.000 + +00:00 or +0000 or +00)
    isoRegex = /^\s*(?:[+-]\d{6}|\d{4})-(?:(\d\d-\d\d)|(W\d\d$)|(W\d\d-\d)|(\d\d\d))((T| )(\d\d(:\d\d(:\d\d(\.\d+)?)?)?)?([\+\-]\d\d(?::?\d\d)?|\s*Z)?)?$/,

    isoFormat = 'YYYY-MM-DDTHH:mm:ssZ',

    isoDates = [
      ['YYYYYY-MM-DD', /[+-]\d{6}-\d{2}-\d{2}/],
      ['YYYY-MM-DD', /\d{4}-\d{2}-\d{2}/],
      ['GGGG-[W]WW-E', /\d{4}-W\d{2}-\d/],
      ['GGGG-[W]WW', /\d{4}-W\d{2}/],
      ['YYYY-DDD', /\d{4}-\d{3}/]
    ],

    // iso time formats and regexes
    isoTimes = [
      ['HH:mm:ss.SSSS', /(T| )\d\d:\d\d:\d\d\.\d{1,3}/],
      ['HH:mm:ss', /(T| )\d\d:\d\d:\d\d/],
      ['HH:mm', /(T| )\d\d:\d\d/],
      ['HH', /(T| )\d\d/]
    ],

    // timezone chunker "+10:00" > ["10", "00"] or "-1530" > ["-15", "30"]
    parseTimezoneChunker = /([\+\-]|\d\d)/gi,

    // getter and setter names
    proxyGettersAndSetters = 'Date|Hours|Minutes|Seconds|Milliseconds'.split('|'),
    unitMillisecondFactors = {
      'Milliseconds': 1,
      'Seconds': 1e3,
      'Minutes': 6e4,
      'Hours': 36e5,
      'Days': 864e5,
      'Months': 2592e6,
      'Years': 31536e6
    },

    unitAliases = {
      ms: 'millisecond',
      s: 'second',
      m: 'minute',
      h: 'hour',
      d: 'day',
      D: 'date',
      w: 'week',
      W: 'isoWeek',
      M: 'month',
      y: 'year',
      DDD: 'dayOfYear',
      e: 'weekday',
      E: 'isoWeekday',
      gg: 'weekYear',
      GG: 'isoWeekYear'
    },

    camelFunctions = {
      dayofyear: 'dayOfYear',
      isoweekday: 'isoWeekday',
      isoweek: 'isoWeek',
      weekyear: 'weekYear',
      isoweekyear: 'isoWeekYear'
    },

    // format function strings
    formatFunctions = {},

    // tokens to ordinalize and pad
    ordinalizeTokens = 'DDD w W M D d'.split(' '),
    paddedTokens = 'M D H h m s w W'.split(' '),

    formatTokenFunctions = {
      M: function () {
        return this.month() + 1;
      },
      MMM: function (format) {
        return this.lang().monthsShort(this, format);
      },
      MMMM: function (format) {
        return this.lang().months(this, format);
      },
      D: function () {
        return this.date();
      },
      DDD: function () {
        return this.dayOfYear();
      },
      d: function () {
        return this.day();
      },
      dd: function (format) {
        return this.lang().weekdaysMin(this, format);
      },
      ddd: function (format) {
        return this.lang().weekdaysShort(this, format);
      },
      dddd: function (format) {
        return this.lang().weekdays(this, format);
      },
      w: function () {
        return this.week();
      },
      W: function () {
        return this.isoWeek();
      },
      YY: function () {
        return leftZeroFill(this.year() % 100, 2);
      },
      YYYY: function () {
        return leftZeroFill(this.year(), 4);
      },
      YYYYY: function () {
        return leftZeroFill(this.year(), 5);
      },
      YYYYYY: function () {
        var y = this.year(), sign = y >= 0 ? '+' : '-';
        return sign + leftZeroFill(Math.abs(y), 6);
      },
      gg: function () {
        return leftZeroFill(this.weekYear() % 100, 2);
      },
      gggg: function () {
        return leftZeroFill(this.weekYear(), 4);
      },
      ggggg: function () {
        return leftZeroFill(this.weekYear(), 5);
      },
      GG: function () {
        return leftZeroFill(this.isoWeekYear() % 100, 2);
      },
      GGGG: function () {
        return leftZeroFill(this.isoWeekYear(), 4);
      },
      GGGGG: function () {
        return leftZeroFill(this.isoWeekYear(), 5);
      },
      e: function () {
        return this.weekday();
      },
      E: function () {
        return this.isoWeekday();
      },
      a: function () {
        return this.lang().meridiem(this.hours(), this.minutes(), true);
      },
      A: function () {
        return this.lang().meridiem(this.hours(), this.minutes(), false);
      },
      H: function () {
        return this.hours();
      },
      h: function () {
        return this.hours() % 12 || 12;
      },
      m: function () {
        return this.minutes();
      },
      s: function () {
        return this.seconds();
      },
      S: function () {
        return toInt(this.milliseconds() / 100);
      },
      SS: function () {
        return leftZeroFill(toInt(this.milliseconds() / 10), 2);
      },
      SSS: function () {
        return leftZeroFill(this.milliseconds(), 3);
      },
      SSSS: function () {
        return leftZeroFill(this.milliseconds(), 3);
      },
      Z: function () {
        var a = -this.zone(),
          b = "+";
        if (a < 0) {
          a = -a;
          b = "-";
        }
        return b + leftZeroFill(toInt(a / 60), 2) + ":" + leftZeroFill(toInt(a) % 60, 2);
      },
      ZZ: function () {
        var a = -this.zone(),
          b = "+";
        if (a < 0) {
          a = -a;
          b = "-";
        }
        return b + leftZeroFill(toInt(a / 60), 2) + leftZeroFill(toInt(a) % 60, 2);
      },
      z: function () {
        return this.zoneAbbr();
      },
      zz: function () {
        return this.zoneName();
      },
      X: function () {
        return this.unix();
      },
      Q: function () {
        return this.quarter();
      }
    },

    lists = ['months', 'monthsShort', 'weekdays', 'weekdaysShort', 'weekdaysMin'];

  function defaultParsingFlags() {
    // We need to deep clone this object, and es5 standard is not very
    // helpful.
    return {
      empty: false,
      unusedTokens: [],
      unusedInput: [],
      overflow: -2,
      charsLeftOver: 0,
      nullInput: false,
      invalidMonth: null,
      invalidFormat: false,
      userInvalidated: false,
      iso: false
    };
  }

  function padToken(func, count) {
    return function (a) {
      return leftZeroFill(func.call(this, a), count);
    };
  }

  function ordinalizeToken(func, period) {
    return function (a) {
      return this.lang().ordinal(func.call(this, a), period);
    };
  }

  while (ordinalizeTokens.length) {
    i = ordinalizeTokens.pop();
    formatTokenFunctions[i + 'o'] = ordinalizeToken(formatTokenFunctions[i], i);
  }
  while (paddedTokens.length) {
    i = paddedTokens.pop();
    formatTokenFunctions[i + i] = padToken(formatTokenFunctions[i], 2);
  }
  formatTokenFunctions.DDDD = padToken(formatTokenFunctions.DDD, 3);


  /************************************
   Constructors
   ************************************/

  function Language() {

  }

  // Moment prototype object
  function Moment(config) {
    checkOverflow(config);
    extend(this, config);
  }

  // Duration Constructor
  function Duration(duration) {
    var normalizedInput = normalizeObjectUnits(duration),
      years = normalizedInput.year || 0,
      months = normalizedInput.month || 0,
      weeks = normalizedInput.week || 0,
      days = normalizedInput.day || 0,
      hours = normalizedInput.hour || 0,
      minutes = normalizedInput.minute || 0,
      seconds = normalizedInput.second || 0,
      milliseconds = normalizedInput.millisecond || 0;

    // representation for dateAddRemove
    this._milliseconds = +milliseconds +
      seconds * 1e3 + // 1000
      minutes * 6e4 + // 1000 * 60
      hours * 36e5; // 1000 * 60 * 60
    // Because of dateAddRemove treats 24 hours as different from a
    // day when working around DST, we need to store them separately
    this._days = +days +
      weeks * 7;
    // It is impossible translate months into days without knowing
    // which months you are are talking about, so we have to store
    // it separately.
    this._months = +months +
      years * 12;

    this._data = {};

    this._bubble();
  }

  /************************************
   Helpers
   ************************************/


  function extend(a, b) {
    for (var i in b) {
      if (b.hasOwnProperty(i)) {
        a[i] = b[i];
      }
    }

    if (b.hasOwnProperty("toString")) {
      a.toString = b.toString;
    }

    if (b.hasOwnProperty("valueOf")) {
      a.valueOf = b.valueOf;
    }

    return a;
  }

  function cloneMoment(m) {
    var result = {}, i;
    for (i in m) {
      if (m.hasOwnProperty(i) && momentProperties.hasOwnProperty(i)) {
        result[i] = m[i];
      }
    }

    return result;
  }

  function absRound(number) {
    if (number < 0) {
      return Math.ceil(number);
    } else {
      return Math.floor(number);
    }
  }

  // left zero fill a number
  // see http://jsperf.com/left-zero-filling for performance comparison
  function leftZeroFill(number, targetLength, forceSign) {
    var output = '' + Math.abs(number),
      sign = number >= 0;

    while (output.length < targetLength) {
      output = '0' + output;
    }
    return (sign ? (forceSign ? '+' : '') : '-') + output;
  }

  // helper function for _.addTime and _.subtractTime
  function addOrSubtractDurationFromMoment(mom, duration, isAdding, ignoreUpdateOffset) {
    var milliseconds = duration._milliseconds,
      days = duration._days,
      months = duration._months,
      minutes,
      hours;

    if (milliseconds) {
      mom._d.setTime(+mom._d + milliseconds * isAdding);
    }
    // store the minutes and hours so we can restore them
    if (days || months) {
      minutes = mom.minute();
      hours = mom.hour();
    }
    if (days) {
      mom.date(mom.date() + days * isAdding);
    }
    if (months) {
      mom.month(mom.month() + months * isAdding);
    }
    if (milliseconds && !ignoreUpdateOffset) {
      moment.updateOffset(mom);
    }
    // restore the minutes and hours after possibly changing dst
    if (days || months) {
      mom.minute(minutes);
      mom.hour(hours);
    }
  }

  // check if is an array
  function isArray(input) {
    return Object.prototype.toString.call(input) === '[object Array]';
  }

  function isDate(input) {
    return Object.prototype.toString.call(input) === '[object Date]' ||
      input instanceof Date;
  }

  // compare two arrays, return the number of differences
  function compareArrays(array1, array2, dontConvert) {
    var len = Math.min(array1.length, array2.length),
      lengthDiff = Math.abs(array1.length - array2.length),
      diffs = 0,
      i;
    for (i = 0; i < len; i++) {
      if ((dontConvert && array1[i] !== array2[i]) ||
        (!dontConvert && toInt(array1[i]) !== toInt(array2[i]))) {
        diffs++;
      }
    }
    return diffs + lengthDiff;
  }

  function normalizeUnits(units) {
    if (units) {
      var lowered = units.toLowerCase().replace(/(.)s$/, '$1');
      units = unitAliases[units] || camelFunctions[lowered] || lowered;
    }
    return units;
  }

  function normalizeObjectUnits(inputObject) {
    var normalizedInput = {},
      normalizedProp,
      prop;

    for (prop in inputObject) {
      if (inputObject.hasOwnProperty(prop)) {
        normalizedProp = normalizeUnits(prop);
        if (normalizedProp) {
          normalizedInput[normalizedProp] = inputObject[prop];
        }
      }
    }

    return normalizedInput;
  }

  function makeList(field) {
    var count, setter;

    if (field.indexOf('week') === 0) {
      count = 7;
      setter = 'day';
    }
    else if (field.indexOf('month') === 0) {
      count = 12;
      setter = 'month';
    }
    else {
      return;
    }

    moment[field] = function (format, index) {
      var i, getter,
        method = moment.fn._lang[field],
        results = [];

      if (typeof format === 'number') {
        index = format;
        format = undefined;
      }

      getter = function (i) {
        var m = moment().utc().set(setter, i);
        return method.call(moment.fn._lang, m, format || '');
      };

      if (index != null) {
        return getter(index);
      }
      else {
        for (i = 0; i < count; i++) {
          results.push(getter(i));
        }
        return results;
      }
    };
  }

  function toInt(argumentForCoercion) {
    var coercedNumber = +argumentForCoercion,
      value = 0;

    if (coercedNumber !== 0 && isFinite(coercedNumber)) {
      if (coercedNumber >= 0) {
        value = Math.floor(coercedNumber);
      } else {
        value = Math.ceil(coercedNumber);
      }
    }

    return value;
  }

  function daysInMonth(year, month) {
    return new Date(Date.UTC(year, month + 1, 0)).getUTCDate();
  }

  function daysInYear(year) {
    return isLeapYear(year) ? 366 : 365;
  }

  function isLeapYear(year) {
    return (year % 4 === 0 && year % 100 !== 0) || year % 400 === 0;
  }

  function checkOverflow(m) {
    var overflow;
    if (m._a && m._pf.overflow === -2) {
      overflow =
        m._a[MONTH] < 0 || m._a[MONTH] > 11 ? MONTH :
          m._a[DATE] < 1 || m._a[DATE] > daysInMonth(m._a[YEAR], m._a[MONTH]) ? DATE :
            m._a[HOUR] < 0 || m._a[HOUR] > 23 ? HOUR :
              m._a[MINUTE] < 0 || m._a[MINUTE] > 59 ? MINUTE :
                m._a[SECOND] < 0 || m._a[SECOND] > 59 ? SECOND :
                  m._a[MILLISECOND] < 0 || m._a[MILLISECOND] > 999 ? MILLISECOND :
                    -1;

      if (m._pf._overflowDayOfYear && (overflow < YEAR || overflow > DATE)) {
        overflow = DATE;
      }

      m._pf.overflow = overflow;
    }
  }

  function isValid(m) {
    if (m._isValid == null) {
      m._isValid = !isNaN(m._d.getTime()) &&
        m._pf.overflow < 0 && !m._pf.empty && !m._pf.invalidMonth && !m._pf.nullInput && !m._pf.invalidFormat && !m._pf.userInvalidated;

      if (m._strict) {
        m._isValid = m._isValid &&
          m._pf.charsLeftOver === 0 &&
          m._pf.unusedTokens.length === 0;
      }
    }
    return m._isValid;
  }

  function normalizeLanguage(key) {
    return key ? key.toLowerCase().replace('_', '-') : key;
  }

  // Return a moment from input, that is local/utc/zone equivalent to model.
  function makeAs(input, model) {
    return model._isUTC ? moment(input).zone(model._offset || 0) :
      moment(input).local();
  }

  /************************************
   Languages
   ************************************/


  extend(Language.prototype, {

    set: function (config) {
      var prop, i;
      for (i in config) {
        prop = config[i];
        if (typeof prop === 'function') {
          this[i] = prop;
        } else {
          this['_' + i] = prop;
        }
      }
    },

    _months: "一月_二月_三月_四月_五月_六月_七月_八月_九月_十月_十一月_十二月".split("_"),
    months: function (m) {
      return this._months[m.month()];
    },

    _monthsShort: "一月_二月_三月_四月_五月_六月_七月_八月_九月_十月_十一月_十二月".split("_"),
    monthsShort: function (m) {
      return this._monthsShort[m.month()];
    },

    monthsParse: function (monthName) {
      var i, mom, regex;

      if (!this._monthsParse) {
        this._monthsParse = [];
      }

      for (i = 0; i < 12; i++) {
        // make the regex if we don't have it already
        if (!this._monthsParse[i]) {
          mom = moment.utc([2000, i]);
          regex = '^' + this.months(mom, '') + '|^' + this.monthsShort(mom, '');
          this._monthsParse[i] = new RegExp(regex.replace('.', ''), 'i');
        }
        // test the regex
        if (this._monthsParse[i].test(monthName)) {
          return i;
        }
      }
    },

    _weekdays: "日_一_二_三_四_五_六".split("_"),
    weekdays: function (m) {
      return this._weekdays[m.day()];
    },

    _weekdaysShort: "日_一_二_三_四_五_六".split("_"),
    weekdaysShort: function (m) {
      return this._weekdaysShort[m.day()];
    },

    _weekdaysMin: "日_一_二_三_四_五_六".split("_"),
    weekdaysMin: function (m) {
      return this._weekdaysMin[m.day()];
    },

    weekdaysParse: function (weekdayName) {
      var i, mom, regex;

      if (!this._weekdaysParse) {
        this._weekdaysParse = [];
      }

      for (i = 0; i < 7; i++) {
        // make the regex if we don't have it already
        if (!this._weekdaysParse[i]) {
          mom = moment([2000, 1]).day(i);
          regex = '^' + this.weekdays(mom, '') + '|^' + this.weekdaysShort(mom, '') + '|^' + this.weekdaysMin(mom, '');
          this._weekdaysParse[i] = new RegExp(regex.replace('.', ''), 'i');
        }
        // test the regex
        if (this._weekdaysParse[i].test(weekdayName)) {
          return i;
        }
      }
    },

    _longDateFormat: {
      LT: "h:mm A",
      L: "MM/DD/YYYY",
      LL: "MMMM D YYYY",
      LLL: "MMMM D YYYY LT",
      LLLL: "dddd, MMMM D YYYY LT"
    },
    longDateFormat: function (key) {
      var output = this._longDateFormat[key];
      if (!output && this._longDateFormat[key.toUpperCase()]) {
        output = this._longDateFormat[key.toUpperCase()].replace(/MMMM|MM|DD|dddd/g, function (val) {
          return val.slice(1);
        });
        this._longDateFormat[key] = output;
      }
      return output;
    },

    isPM: function (input) {
      // IE8 Quirks Mode & IE7 Standards Mode do not allow accessing strings like arrays
      // Using charAt should be more compatible.
      return ((input + '').toLowerCase().charAt(0) === 'p');
    },

    _meridiemParse: /[ap]\.?m?\.?/i,
    meridiem: function (hours, minutes, isLower) {
      if (hours > 11) {
        return isLower ? 'pm' : 'PM';
      } else {
        return isLower ? 'am' : 'AM';
      }
    },

    _calendar: {
      sameDay: '[Today at] LT',
      nextDay: '[Tomorrow at] LT',
      nextWeek: 'dddd [at] LT',
      lastDay: '[Yesterday at] LT',
      lastWeek: '[Last] dddd [at] LT',
      sameElse: 'L'
    },
    calendar: function (key, mom) {
      var output = this._calendar[key];
      return typeof output === 'function' ? output.apply(mom) : output;
    },

    _relativeTime: {
      future: "in %s",
      past: "%s ago",
      s: "a few seconds",
      m: "a minute",
      mm: "%d minutes",
      h: "an hour",
      hh: "%d hours",
      d: "a day",
      dd: "%d days",
      M: "a month",
      MM: "%d months",
      y: "a year",
      yy: "%d years"
    },
    relativeTime: function (number, withoutSuffix, string, isFuture) {
      var output = this._relativeTime[string];
      return (typeof output === 'function') ?
        output(number, withoutSuffix, string, isFuture) :
        output.replace(/%d/i, number);
    },
    pastFuture: function (diff, output) {
      var format = this._relativeTime[diff > 0 ? 'future' : 'past'];
      return typeof format === 'function' ? format(output) : format.replace(/%s/i, output);
    },

    ordinal: function (number) {
      return this._ordinal.replace("%d", number);
    },
    _ordinal: "%d",

    preparse: function (string) {
      return string;
    },

    postformat: function (string) {
      return string;
    },

    week: function (mom) {
      return weekOfYear(mom, this._week.dow, this._week.doy).week;
    },

    _week: {
      dow: 0, // Sunday is the first day of the week.
      doy: 6  // The week that contains Jan 1st is the first week of the year.
    },

    _invalidDate: 'Invalid date',
    invalidDate: function () {
      return this._invalidDate;
    }
  });

  // Loads a language definition into the `languages` cache.  The function
  // takes a key and optionally values.  If not in the browser and no values
  // are provided, it will load the language file module.  As a convenience,
  // this function also returns the language values.
  function loadLang(key, values) {
    values.abbr = key;
    if (!languages[key]) {
      languages[key] = new Language();
    }
    languages[key].set(values);
    return languages[key];
  }

  // Remove a language from the `languages` cache. Mostly useful in tests.
  function unloadLang(key) {
    delete languages[key];
  }

  // Determines which language definition to use and returns it.
  //
  // With no parameters, it will return the global language.  If you
  // pass in a language key, such as 'en', it will return the
  // definition for 'en', so long as 'en' has already been loaded using
  // moment.lang.
  function getLangDefinition(key) {
    var i = 0, j, lang, next, split,
      get = function (k) {
        if (!languages[k] && hasModule) {
          try {
            require('./lang/' + k);
          } catch (e) {
          }
        }
        return languages[k];
      };

    if (!key) {
      return moment.fn._lang;
    }

    if (!isArray(key)) {
      //short-circuit everything else
      lang = get(key);
      if (lang) {
        return lang;
      }
      key = [key];
    }

    //pick the language from the array
    //try ['en-au', 'en-gb'] as 'en-au', 'en-gb', 'en', as in move through the list trying each
    //substring from most specific to least, but move to the next array item if it's a more specific variant than the current root
    while (i < key.length) {
      split = normalizeLanguage(key[i]).split('-');
      j = split.length;
      next = normalizeLanguage(key[i + 1]);
      next = next ? next.split('-') : null;
      while (j > 0) {
        lang = get(split.slice(0, j).join('-'));
        if (lang) {
          return lang;
        }
        if (next && next.length >= j && compareArrays(split, next, true) >= j - 1) {
          //the next array item is better than a shallower substring of this one
          break;
        }
        j--;
      }
      i++;
    }
    return moment.fn._lang;
  }

  /************************************
   Formatting
   ************************************/


  function removeFormattingTokens(input) {
    if (input.match(/\[[\s\S]/)) {
      return input.replace(/^\[|\]$/g, "");
    }
    return input.replace(/\\/g, "");
  }

  function makeFormatFunction(format) {
    var array = format.match(formattingTokens), i, length;

    for (i = 0, length = array.length; i < length; i++) {
      if (formatTokenFunctions[array[i]]) {
        array[i] = formatTokenFunctions[array[i]];
      } else {
        array[i] = removeFormattingTokens(array[i]);
      }
    }

    return function (mom) {
      var output = "";
      for (i = 0; i < length; i++) {
        output += array[i] instanceof Function ? array[i].call(mom, format) : array[i];
      }
      return output;
    };
  }

  // format date using native date object
  function formatMoment(m, format) {

    if (!m.isValid()) {
      return m.lang().invalidDate();
    }

    format = expandFormat(format, m.lang());

    if (!formatFunctions[format]) {
      formatFunctions[format] = makeFormatFunction(format);
    }

    return formatFunctions[format](m);
  }

  function expandFormat(format, lang) {
    var i = 5;

    function replaceLongDateFormatTokens(input) {
      return lang.longDateFormat(input) || input;
    }

    localFormattingTokens.lastIndex = 0;
    while (i >= 0 && localFormattingTokens.test(format)) {
      format = format.replace(localFormattingTokens, replaceLongDateFormatTokens);
      localFormattingTokens.lastIndex = 0;
      i -= 1;
    }

    return format;
  }


  /************************************
   Parsing
   ************************************/


  // get the regex to find the next token
  function getParseRegexForToken(token, config) {
    var a, strict = config._strict;
    switch (token) {
      case 'DDDD':
        return parseTokenThreeDigits;
      case 'YYYY':
      case 'GGGG':
      case 'gggg':
        return strict ? parseTokenFourDigits : parseTokenOneToFourDigits;
      case 'Y':
      case 'G':
      case 'g':
        return parseTokenSignedNumber;
      case 'YYYYYY':
      case 'YYYYY':
      case 'GGGGG':
      case 'ggggg':
        return strict ? parseTokenSixDigits : parseTokenOneToSixDigits;
      case 'S':
        if (strict) {
          return parseTokenOneDigit;
        }
      /* falls through */
      case 'SS':
        if (strict) {
          return parseTokenTwoDigits;
        }
      /* falls through */
      case 'SSS':
        if (strict) {
          return parseTokenThreeDigits;
        }
      /* falls through */
      case 'DDD':
        return parseTokenOneToThreeDigits;
      case 'MMM':
      case 'MMMM':
      case 'dd':
      case 'ddd':
      case 'dddd':
        return parseTokenWord;
      case 'a':
      case 'A':
        return getLangDefinition(config._l)._meridiemParse;
      case 'X':
        return parseTokenTimestampMs;
      case 'Z':
      case 'ZZ':
        return parseTokenTimezone;
      case 'T':
        return parseTokenT;
      case 'SSSS':
        return parseTokenDigits;
      case 'MM':
      case 'DD':
      case 'YY':
      case 'GG':
      case 'gg':
      case 'HH':
      case 'hh':
      case 'mm':
      case 'ss':
      case 'ww':
      case 'WW':
        return strict ? parseTokenTwoDigits : parseTokenOneOrTwoDigits;
      case 'M':
      case 'D':
      case 'd':
      case 'H':
      case 'h':
      case 'm':
      case 's':
      case 'w':
      case 'W':
      case 'e':
      case 'E':
        return parseTokenOneOrTwoDigits;
      default :
        a = new RegExp(regexpEscape(unescapeFormat(token.replace('\\', '')), "i"));
        return a;
    }
  }

  function timezoneMinutesFromString(string) {
    string = string || "";
    var possibleTzMatches = (string.match(parseTokenTimezone) || []),
      tzChunk = possibleTzMatches[possibleTzMatches.length - 1] || [],
      parts = (tzChunk + '').match(parseTimezoneChunker) || ['-', 0, 0],
      minutes = +(parts[1] * 60) + toInt(parts[2]);

    return parts[0] === '+' ? -minutes : minutes;
  }

  // function to convert string input to date
  function addTimeToArrayFromToken(token, input, config) {
    var a, datePartArray = config._a;

    switch (token) {
      // MONTH
      case 'M' : // fall through to MM
      case 'MM' :
        if (input != null) {
          datePartArray[MONTH] = toInt(input) - 1;
        }
        break;
      case 'MMM' : // fall through to MMMM
      case 'MMMM' :
        a = getLangDefinition(config._l).monthsParse(input);
        // if we didn't find a month name, mark the date as invalid.
        if (a != null) {
          datePartArray[MONTH] = a;
        } else {
          config._pf.invalidMonth = input;
        }
        break;
      // DAY OF MONTH
      case 'D' : // fall through to DD
      case 'DD' :
        if (input != null) {
          datePartArray[DATE] = toInt(input);
        }
        break;
      // DAY OF YEAR
      case 'DDD' : // fall through to DDDD
      case 'DDDD' :
        if (input != null) {
          config._dayOfYear = toInt(input);
        }

        break;
      // YEAR
      case 'YY' :
        datePartArray[YEAR] = toInt(input) + (toInt(input) > 68 ? 1900 : 2000);
        break;
      case 'YYYY' :
      case 'YYYYY' :
      case 'YYYYYY' :
        datePartArray[YEAR] = toInt(input);
        break;
      // AM / PM
      case 'a' : // fall through to A
      case 'A' :
        config._isPm = getLangDefinition(config._l).isPM(input);
        break;
      // 24 HOUR
      case 'H' : // fall through to hh
      case 'HH' : // fall through to hh
      case 'h' : // fall through to hh
      case 'hh' :
        datePartArray[HOUR] = toInt(input);
        break;
      // MINUTE
      case 'm' : // fall through to mm
      case 'mm' :
        datePartArray[MINUTE] = toInt(input);
        break;
      // SECOND
      case 's' : // fall through to ss
      case 'ss' :
        datePartArray[SECOND] = toInt(input);
        break;
      // MILLISECOND
      case 'S' :
      case 'SS' :
      case 'SSS' :
      case 'SSSS' :
        datePartArray[MILLISECOND] = toInt(('0.' + input) * 1000);
        break;
      // UNIX TIMESTAMP WITH MS
      case 'X':
        config._d = new Date(parseFloat(input) * 1000);
        break;
      // TIMEZONE
      case 'Z' : // fall through to ZZ
      case 'ZZ' :
        config._useUTC = true;
        config._tzm = timezoneMinutesFromString(input);
        break;
      case 'w':
      case 'ww':
      case 'W':
      case 'WW':
      case 'd':
      case 'dd':
      case 'ddd':
      case 'dddd':
      case 'e':
      case 'E':
        token = token.substr(0, 1);
      /* falls through */
      case 'gg':
      case 'gggg':
      case 'GG':
      case 'GGGG':
      case 'GGGGG':
        token = token.substr(0, 2);
        if (input) {
          config._w = config._w || {};
          config._w[token] = input;
        }
        break;
    }
  }

  // convert an array to a date.
  // the array should mirror the parameters below
  // note: all values past the year are optional and will default to the lowest possible value.
  // [year, month, day , hour, minute, second, millisecond]
  function dateFromConfig(config) {
    var i, date, input = [], currentDate,
      yearToUse, fixYear, w, temp, lang, weekday, week;

    if (config._d) {
      return;
    }

    currentDate = currentDateArray(config);

    //compute day of the year from weeks and weekdays
    if (config._w && config._a[DATE] == null && config._a[MONTH] == null) {
      fixYear = function (val) {
        var int_val = parseInt(val, 10);
        return val ?
          (val.length < 3 ? (int_val > 68 ? 1900 + int_val : 2000 + int_val) : int_val) :
          (config._a[YEAR] == null ? moment().weekYear() : config._a[YEAR]);
      };

      w = config._w;
      if (w.GG != null || w.W != null || w.E != null) {
        temp = dayOfYearFromWeeks(fixYear(w.GG), w.W || 1, w.E, 4, 1);
      }
      else {
        lang = getLangDefinition(config._l);
        weekday = w.d != null ? parseWeekday(w.d, lang) :
          (w.e != null ? parseInt(w.e, 10) + lang._week.dow : 0);

        week = parseInt(w.w, 10) || 1;

        //if we're parsing 'd', then the low day numbers may be next week
        if (w.d != null && weekday < lang._week.dow) {
          week++;
        }

        temp = dayOfYearFromWeeks(fixYear(w.gg), week, weekday, lang._week.doy, lang._week.dow);
      }

      config._a[YEAR] = temp.year;
      config._dayOfYear = temp.dayOfYear;
    }

    //if the day of the year is set, figure out what it is
    if (config._dayOfYear) {
      yearToUse = config._a[YEAR] == null ? currentDate[YEAR] : config._a[YEAR];

      if (config._dayOfYear > daysInYear(yearToUse)) {
        config._pf._overflowDayOfYear = true;
      }

      date = makeUTCDate(yearToUse, 0, config._dayOfYear);
      config._a[MONTH] = date.getUTCMonth();
      config._a[DATE] = date.getUTCDate();
    }

    // Default to current date.
    // * if no year, month, day of month are given, default to today
    // * if day of month is given, default month and year
    // * if month is given, default only year
    // * if year is given, don't default anything
    for (i = 0; i < 3 && config._a[i] == null; ++i) {
      config._a[i] = input[i] = currentDate[i];
    }

    // Zero out whatever was not defaulted, including time
    for (; i < 7; i++) {
      config._a[i] = input[i] = (config._a[i] == null) ? (i === 2 ? 1 : 0) : config._a[i];
    }

    // add the offsets to the time to be parsed so that we can have a clean array for checking isValid
    input[HOUR] += toInt((config._tzm || 0) / 60);
    input[MINUTE] += toInt((config._tzm || 0) % 60);

    config._d = (config._useUTC ? makeUTCDate : makeDate).apply(null, input);
  }

  function dateFromObject(config) {
    var normalizedInput;

    if (config._d) {
      return;
    }

    normalizedInput = normalizeObjectUnits(config._i);
    config._a = [
      normalizedInput.year,
      normalizedInput.month,
      normalizedInput.day,
      normalizedInput.hour,
      normalizedInput.minute,
      normalizedInput.second,
      normalizedInput.millisecond
    ];

    dateFromConfig(config);
  }

  function currentDateArray(config) {
    var now = new Date();
    if (config._useUTC) {
      return [
        now.getUTCFullYear(),
        now.getUTCMonth(),
        now.getUTCDate()
      ];
    } else {
      return [now.getFullYear(), now.getMonth(), now.getDate()];
    }
  }

  // date from string and format string
  function makeDateFromStringAndFormat(config) {

    config._a = [];
    config._pf.empty = true;

    // This array is used to make a Date, either with `new Date` or `Date.UTC`
    var lang = getLangDefinition(config._l),
      string = '' + config._i,
      i, parsedInput, tokens, token, skipped,
      stringLength = string.length,
      totalParsedInputLength = 0;

    tokens = expandFormat(config._f, lang).match(formattingTokens) || [];

    for (i = 0; i < tokens.length; i++) {
      token = tokens[i];
      parsedInput = (string.match(getParseRegexForToken(token, config)) || [])[0];
      if (parsedInput) {
        skipped = string.substr(0, string.indexOf(parsedInput));
        if (skipped.length > 0) {
          config._pf.unusedInput.push(skipped);
        }
        string = string.slice(string.indexOf(parsedInput) + parsedInput.length);
        totalParsedInputLength += parsedInput.length;
      }
      // don't parse if it's not a known token
      if (formatTokenFunctions[token]) {
        if (parsedInput) {
          config._pf.empty = false;
        }
        else {
          config._pf.unusedTokens.push(token);
        }
        addTimeToArrayFromToken(token, parsedInput, config);
      }
      else if (config._strict && !parsedInput) {
        config._pf.unusedTokens.push(token);
      }
    }

    // add remaining unparsed input length to the string
    config._pf.charsLeftOver = stringLength - totalParsedInputLength;
    if (string.length > 0) {
      config._pf.unusedInput.push(string);
    }

    // handle am pm
    if (config._isPm && config._a[HOUR] < 12) {
      config._a[HOUR] += 12;
    }
    // if is 12 am, change hours to 0
    if (config._isPm === false && config._a[HOUR] === 12) {
      config._a[HOUR] = 0;
    }

    dateFromConfig(config);
    checkOverflow(config);
  }

  function unescapeFormat(s) {
    return s.replace(/\\(\[)|\\(\])|\[([^\]\[]*)\]|\\(.)/g, function (matched, p1, p2, p3, p4) {
      return p1 || p2 || p3 || p4;
    });
  }

  // Code from http://stackoverflow.com/questions/3561493/is-there-a-regexp-escape-function-in-javascript
  function regexpEscape(s) {
    return s.replace(/[-\/\\^$*+?.()|[\]{}]/g, '\\$&');
  }

  // date from string and array of format strings
  function makeDateFromStringAndArray(config) {
    var tempConfig,
      bestMoment,

      scoreToBeat,
      i,
      currentScore;

    if (config._f.length === 0) {
      config._pf.invalidFormat = true;
      config._d = new Date(NaN);
      return;
    }

    for (i = 0; i < config._f.length; i++) {
      currentScore = 0;
      tempConfig = extend({}, config);
      tempConfig._pf = defaultParsingFlags();
      tempConfig._f = config._f[i];
      makeDateFromStringAndFormat(tempConfig);

      if (!isValid(tempConfig)) {
        continue;
      }

      // if there is any input that was not parsed add a penalty for that format
      currentScore += tempConfig._pf.charsLeftOver;

      //or tokens
      currentScore += tempConfig._pf.unusedTokens.length * 10;

      tempConfig._pf.score = currentScore;

      if (scoreToBeat == null || currentScore < scoreToBeat) {
        scoreToBeat = currentScore;
        bestMoment = tempConfig;
      }
    }

    extend(config, bestMoment || tempConfig);
  }

  // date from iso format
  function makeDateFromString(config) {
    var i, l,
      string = config._i,
      match = isoRegex.exec(string);

    if (match) {
      config._pf.iso = true;
      for (i = 0, l = isoDates.length; i < l; i++) {
        if (isoDates[i][1].exec(string)) {
          // match[5] should be "T" or undefined
          config._f = isoDates[i][0] + (match[6] || " ");
          break;
        }
      }
      for (i = 0, l = isoTimes.length; i < l; i++) {
        if (isoTimes[i][1].exec(string)) {
          config._f += isoTimes[i][0];
          break;
        }
      }
      if (string.match(parseTokenTimezone)) {
        config._f += "Z";
      }
      makeDateFromStringAndFormat(config);
    }
    else {
      config._d = new Date(string);
    }
  }

  function makeDateFromInput(config) {
    var input = config._i,
      matched = aspNetJsonRegex.exec(input);

    if (input === undefined) {
      config._d = new Date();
    } else if (matched) {
      config._d = new Date(+matched[1]);
    } else if (typeof input === 'string') {
      makeDateFromString(config);
    } else if (isArray(input)) {
      config._a = input.slice(0);
      dateFromConfig(config);
    } else if (isDate(input)) {
      config._d = new Date(+input);
    } else if (typeof(input) === 'object') {
      dateFromObject(config);
    } else {
      config._d = new Date(input);
    }
  }

  function makeDate(y, m, d, h, M, s, ms) {
    //can't just apply() to create a date:
    //http://stackoverflow.com/questions/181348/instantiating-a-javascript-object-by-calling-prototype-constructor-apply
    var date = new Date(y, m, d, h, M, s, ms);

    //the date constructor doesn't accept years < 1970
    if (y < 1970) {
      date.setFullYear(y);
    }
    return date;
  }

  function makeUTCDate(y) {
    var date = new Date(Date.UTC.apply(null, arguments));
    if (y < 1970) {
      date.setUTCFullYear(y);
    }
    return date;
  }

  function parseWeekday(input, language) {
    if (typeof input === 'string') {
      if (!isNaN(input)) {
        input = parseInt(input, 10);
      }
      else {
        input = language.weekdaysParse(input);
        if (typeof input !== 'number') {
          return null;
        }
      }
    }
    return input;
  }

  /************************************
   Relative Time
   ************************************/


  // helper function for moment.fn.from, moment.fn.fromNow, and moment.duration.fn.humanize
  function substituteTimeAgo(string, number, withoutSuffix, isFuture, lang) {
    return lang.relativeTime(number || 1, !!withoutSuffix, string, isFuture);
  }

  function relativeTime(milliseconds, withoutSuffix, lang) {
    var seconds = round(Math.abs(milliseconds) / 1000),
      minutes = round(seconds / 60),
      hours = round(minutes / 60),
      days = round(hours / 24),
      years = round(days / 365),
      args = seconds < 45 && ['s', seconds] ||
        minutes === 1 && ['m'] ||
        minutes < 45 && ['mm', minutes] ||
        hours === 1 && ['h'] ||
        hours < 22 && ['hh', hours] ||
        days === 1 && ['d'] ||
        days <= 25 && ['dd', days] ||
        days <= 45 && ['M'] ||
        days < 345 && ['MM', round(days / 30)] ||
        years === 1 && ['y'] || ['yy', years];
    args[2] = withoutSuffix;
    args[3] = milliseconds > 0;
    args[4] = lang;
    return substituteTimeAgo.apply({}, args);
  }


  /************************************
   Week of Year
   ************************************/


  // firstDayOfWeek       0 = sun, 6 = sat
  //                      the day of the week that starts the week
  //                      (usually sunday or monday)
  // firstDayOfWeekOfYear 0 = sun, 6 = sat
  //                      the first week is the week that contains the first
  //                      of this day of the week
  //                      (eg. ISO weeks use thursday (4))
  function weekOfYear(mom, firstDayOfWeek, firstDayOfWeekOfYear) {
    var end = firstDayOfWeekOfYear - firstDayOfWeek,
      daysToDayOfWeek = firstDayOfWeekOfYear - mom.day(),
      adjustedMoment;


    if (daysToDayOfWeek > end) {
      daysToDayOfWeek -= 7;
    }

    if (daysToDayOfWeek < end - 7) {
      daysToDayOfWeek += 7;
    }

    adjustedMoment = moment(mom).add('d', daysToDayOfWeek);
    return {
      week: Math.ceil(adjustedMoment.dayOfYear() / 7),
      year: adjustedMoment.year()
    };
  }

  //http://en.wikipedia.org/wiki/ISO_week_date#Calculating_a_date_given_the_year.2C_week_number_and_weekday
  function dayOfYearFromWeeks(year, week, weekday, firstDayOfWeekOfYear, firstDayOfWeek) {
    var d = makeUTCDate(year, 0, 1).getUTCDay(), daysToAdd, dayOfYear;

    weekday = weekday != null ? weekday : firstDayOfWeek;
    daysToAdd = firstDayOfWeek - d + (d > firstDayOfWeekOfYear ? 7 : 0) - (d < firstDayOfWeek ? 7 : 0);
    dayOfYear = 7 * (week - 1) + (weekday - firstDayOfWeek) + daysToAdd + 1;

    return {
      year: dayOfYear > 0 ? year : year - 1,
      dayOfYear: dayOfYear > 0 ? dayOfYear : daysInYear(year - 1) + dayOfYear
    };
  }

  /************************************
   Top Level Functions
   ************************************/

  function makeMoment(config) {
    var input = config._i,
      format = config._f;

    if (input === null) {
      return moment.invalid({nullInput: true});
    }

    if (typeof input === 'string') {
      config._i = input = getLangDefinition().preparse(input);
    }

    if (moment.isMoment(input)) {
      config = cloneMoment(input);

      config._d = new Date(+input._d);
    } else if (format) {
      if (isArray(format)) {
        makeDateFromStringAndArray(config);
      } else {
        makeDateFromStringAndFormat(config);
      }
    } else {
      makeDateFromInput(config);
    }

    return new Moment(config);
  }

  moment = function (input, format, lang, strict) {
    var c;

    if (typeof(lang) === "boolean") {
      strict = lang;
      lang = undefined;
    }
    // object construction must be done this way.
    // https://github.com/moment/moment/issues/1423
    c = {};
    c._isAMomentObject = true;
    c._i = input;
    c._f = format;
    c._l = lang;
    c._strict = strict;
    c._isUTC = false;
    c._pf = defaultParsingFlags();

    return makeMoment(c);
  };

  // creating with utc
  moment.utc = function (input, format, lang, strict) {
    var c;

    if (typeof(lang) === "boolean") {
      strict = lang;
      lang = undefined;
    }
    // object construction must be done this way.
    // https://github.com/moment/moment/issues/1423
    c = {};
    c._isAMomentObject = true;
    c._useUTC = true;
    c._isUTC = true;
    c._l = lang;
    c._i = input;
    c._f = format;
    c._strict = strict;
    c._pf = defaultParsingFlags();

    return makeMoment(c).utc();
  };

  // creating with unix timestamp (in seconds)
  moment.unix = function (input) {
    return moment(input * 1000);
  };

  // duration
  moment.duration = function (input, key) {
    var duration = input,
      // matching against regexp is expensive, do it on demand
      match = null,
      sign,
      ret,
      parseIso;

    if (moment.isDuration(input)) {
      duration = {
        ms: input._milliseconds,
        d: input._days,
        M: input._months
      };
    } else if (typeof input === 'number') {
      duration = {};
      if (key) {
        duration[key] = input;
      } else {
        duration.milliseconds = input;
      }
    } else if (!!(match = aspNetTimeSpanJsonRegex.exec(input))) {
      sign = (match[1] === "-") ? -1 : 1;
      duration = {
        y: 0,
        d: toInt(match[DATE]) * sign,
        h: toInt(match[HOUR]) * sign,
        m: toInt(match[MINUTE]) * sign,
        s: toInt(match[SECOND]) * sign,
        ms: toInt(match[MILLISECOND]) * sign
      };
    } else if (!!(match = isoDurationRegex.exec(input))) {
      sign = (match[1] === "-") ? -1 : 1;
      parseIso = function (inp) {
        // We'd normally use ~~inp for this, but unfortunately it also
        // converts floats to ints.
        // inp may be undefined, so careful calling replace on it.
        var res = inp && parseFloat(inp.replace(',', '.'));
        // apply sign while we're at it
        return (isNaN(res) ? 0 : res) * sign;
      };
      duration = {
        y: parseIso(match[2]),
        M: parseIso(match[3]),
        d: parseIso(match[4]),
        h: parseIso(match[5]),
        m: parseIso(match[6]),
        s: parseIso(match[7]),
        w: parseIso(match[8])
      };
    }

    ret = new Duration(duration);

    if (moment.isDuration(input) && input.hasOwnProperty('_lang')) {
      ret._lang = input._lang;
    }

    return ret;
  };

  // version number
  moment.version = VERSION;

  // default format
  moment.defaultFormat = isoFormat;

  // This function will be called whenever a moment is mutated.
  // It is intended to keep the offset in sync with the timezone.
  moment.updateOffset = function () {
  };

  // This function will load languages and then set the global language.  If
  // no arguments are passed in, it will simply return the current global
  // language key.
  moment.lang = function (key, values) {
    var r;
    if (!key) {
      return moment.fn._lang._abbr;
    }
    if (values) {
      loadLang(normalizeLanguage(key), values);
    } else if (values === null) {
      unloadLang(key);
      key = 'en';
    } else if (!languages[key]) {
      getLangDefinition(key);
    }
    r = moment.duration.fn._lang = moment.fn._lang = getLangDefinition(key);
    return r._abbr;
  };

  // returns language data
  moment.langData = function (key) {
    if (key && key._lang && key._lang._abbr) {
      key = key._lang._abbr;
    }
    return getLangDefinition(key);
  };

  // compare moment object
  moment.isMoment = function (obj) {
    return obj instanceof Moment ||
      (obj != null && obj.hasOwnProperty('_isAMomentObject'));
  };

  // for typechecking Duration objects
  moment.isDuration = function (obj) {
    return obj instanceof Duration;
  };

  for (i = lists.length - 1; i >= 0; --i) {
    makeList(lists[i]);
  }

  moment.normalizeUnits = function (units) {
    return normalizeUnits(units);
  };

  moment.invalid = function (flags) {
    var m = moment.utc(NaN);
    if (flags != null) {
      extend(m._pf, flags);
    }
    else {
      m._pf.userInvalidated = true;
    }

    return m;
  };

  moment.parseZone = function (input) {
    return moment(input).parseZone();
  };

  /************************************
   Moment Prototype
   ************************************/


  extend(moment.fn = Moment.prototype, {

    clone: function () {
      return moment(this);
    },

    valueOf: function () {
      return +this._d + ((this._offset || 0) * 60000);
    },

    unix: function () {
      return Math.floor(+this / 1000);
    },

    toString: function () {
      return this.clone().lang('en').format("ddd MMM DD YYYY HH:mm:ss [GMT]ZZ");
    },

    toDate: function () {
      return this._offset ? new Date(+this) : this._d;
    },

    toISOString: function () {
      var m = moment(this).utc();
      if (0 < m.year() && m.year() <= 9999) {
        return formatMoment(m, 'YYYY-MM-DD[T]HH:mm:ss.SSS[Z]');
      } else {
        return formatMoment(m, 'YYYYYY-MM-DD[T]HH:mm:ss.SSS[Z]');
      }
    },

    toArray: function () {
      var m = this;
      return [
        m.year(),
        m.month(),
        m.date(),
        m.hours(),
        m.minutes(),
        m.seconds(),
        m.milliseconds()
      ];
    },

    isValid: function () {
      return isValid(this);
    },

    isDSTShifted: function () {

      if (this._a) {
        return this.isValid() && compareArrays(this._a, (this._isUTC ? moment.utc(this._a) : moment(this._a)).toArray()) > 0;
      }

      return false;
    },

    parsingFlags: function () {
      return extend({}, this._pf);
    },

    invalidAt: function () {
      return this._pf.overflow;
    },

    utc: function () {
      return this.zone(0);
    },

    local: function () {
      this.zone(0);
      this._isUTC = false;
      return this;
    },

    format: function (inputString) {
      var output = formatMoment(this, inputString || moment.defaultFormat);
      return this.lang().postformat(output);
    },

    add: function (input, val) {
      var dur;
      // switch args to support add('s', 1) and add(1, 's')
      if (typeof input === 'string') {
        dur = moment.duration(+val, input);
      } else {
        dur = moment.duration(input, val);
      }
      addOrSubtractDurationFromMoment(this, dur, 1);
      return this;
    },

    subtract: function (input, val) {
      var dur;
      // switch args to support subtract('s', 1) and subtract(1, 's')
      if (typeof input === 'string') {
        dur = moment.duration(+val, input);
      } else {
        dur = moment.duration(input, val);
      }
      addOrSubtractDurationFromMoment(this, dur, -1);
      return this;
    },

    diff: function (input, units, asFloat) {
      var that = makeAs(input, this),
        zoneDiff = (this.zone() - that.zone()) * 6e4,
        diff, output;

      units = normalizeUnits(units);

      if (units === 'year' || units === 'month') {
        // average number of days in the months in the given dates
        diff = (this.daysInMonth() + that.daysInMonth()) * 432e5; // 24 * 60 * 60 * 1000 / 2
        // difference in months
        output = ((this.year() - that.year()) * 12) + (this.month() - that.month());
        // adjust by taking difference in days, average number of days
        // and dst in the given months.
        output += ((this - moment(this).startOf('month')) -
          (that - moment(that).startOf('month'))) / diff;
        // same as above but with zones, to negate all dst
        output -= ((this.zone() - moment(this).startOf('month').zone()) -
          (that.zone() - moment(that).startOf('month').zone())) * 6e4 / diff;
        if (units === 'year') {
          output = output / 12;
        }
      } else {
        diff = (this - that);
        output = units === 'second' ? diff / 1e3 : // 1000
          units === 'minute' ? diff / 6e4 : // 1000 * 60
            units === 'hour' ? diff / 36e5 : // 1000 * 60 * 60
              units === 'day' ? (diff - zoneDiff) / 864e5 : // 1000 * 60 * 60 * 24, negate dst
                units === 'week' ? (diff - zoneDiff) / 6048e5 : // 1000 * 60 * 60 * 24 * 7, negate dst
                  diff;
      }
      return asFloat ? output : absRound(output);
    },

    from: function (time, withoutSuffix) {
      return moment.duration(this.diff(time)).lang(this.lang()._abbr).humanize(!withoutSuffix);
    },

    fromNow: function (withoutSuffix) {
      return this.from(moment(), withoutSuffix);
    },

    calendar: function () {
      // We want to compare the start of today, vs this.
      // Getting start-of-today depends on whether we're zone'd or not.
      var sod = makeAs(moment(), this).startOf('day'),
        diff = this.diff(sod, 'days', true),
        format = diff < -6 ? 'sameElse' :
          diff < -1 ? 'lastWeek' :
            diff < 0 ? 'lastDay' :
              diff < 1 ? 'sameDay' :
                diff < 2 ? 'nextDay' :
                  diff < 7 ? 'nextWeek' : 'sameElse';
      return this.format(this.lang().calendar(format, this));
    },

    isLeapYear: function () {
      return isLeapYear(this.year());
    },

    isDST: function () {
      return (this.zone() < this.clone().month(0).zone() ||
      this.zone() < this.clone().month(5).zone());
    },

    day: function (input) {
      var day = this._isUTC ? this._d.getUTCDay() : this._d.getDay();
      if (input != null) {
        input = parseWeekday(input, this.lang());
        return this.add({d: input - day});
      } else {
        return day;
      }
    },

    month: function (input) {
      var utc = this._isUTC ? 'UTC' : '',
        dayOfMonth;

      if (input != null) {
        if (typeof input === 'string') {
          input = this.lang().monthsParse(input);
          if (typeof input !== 'number') {
            return this;
          }
        }

        dayOfMonth = this.date();
        this.date(1);
        this._d['set' + utc + 'Month'](input);
        this.date(Math.min(dayOfMonth, this.daysInMonth()));

        moment.updateOffset(this);
        return this;
      } else {
        return this._d['get' + utc + 'Month']();
      }
    },

    startOf: function (units) {
      units = normalizeUnits(units);
      // the following switch intentionally omits break keywords
      // to utilize falling through the cases.
      switch (units) {
        case 'year':
          this.month(0);
        /* falls through */
        case 'month':
          this.date(1);
        /* falls through */
        case 'week':
        case 'isoWeek':
        case 'day':
          this.hours(0);
        /* falls through */
        case 'hour':
          this.minutes(0);
        /* falls through */
        case 'minute':
          this.seconds(0);
        /* falls through */
        case 'second':
          this.milliseconds(0);
        /* falls through */
      }

      // weeks are a special case
      if (units === 'week') {
        this.weekday(0);
      } else if (units === 'isoWeek') {
        this.isoWeekday(1);
      }

      return this;
    },

    endOf: function (units) {
      units = normalizeUnits(units);
      return this.startOf(units).add((units === 'isoWeek' ? 'week' : units), 1).subtract('ms', 1);
    },

    isAfter: function (input, units) {
      units = typeof units !== 'undefined' ? units : 'millisecond';
      return +this.clone().startOf(units) > +moment(input).startOf(units);
    },

    isBefore: function (input, units) {
      units = typeof units !== 'undefined' ? units : 'millisecond';
      return +this.clone().startOf(units) < +moment(input).startOf(units);
    },

    isSame: function (input, units) {
      units = units || 'ms';
      return +this.clone().startOf(units) === +makeAs(input, this).startOf(units);
    },

    min: function (other) {
      other = moment.apply(null, arguments);
      return other < this ? this : other;
    },

    max: function (other) {
      other = moment.apply(null, arguments);
      return other > this ? this : other;
    },

    zone: function (input) {
      var offset = this._offset || 0;
      if (input != null) {
        if (typeof input === "string") {
          input = timezoneMinutesFromString(input);
        }
        if (Math.abs(input) < 16) {
          input = input * 60;
        }
        this._offset = input;
        this._isUTC = true;
        if (offset !== input) {
          addOrSubtractDurationFromMoment(this, moment.duration(offset - input, 'm'), 1, true);
        }
      } else {
        return this._isUTC ? offset : this._d.getTimezoneOffset();
      }
      return this;
    },

    zoneAbbr: function () {
      return this._isUTC ? "UTC" : "";
    },

    zoneName: function () {
      return this._isUTC ? "Coordinated Universal Time" : "";
    },

    parseZone: function () {
      if (this._tzm) {
        this.zone(this._tzm);
      } else if (typeof this._i === 'string') {
        this.zone(this._i);
      }
      return this;
    },

    hasAlignedHourOffset: function (input) {
      if (!input) {
        input = 0;
      }
      else {
        input = moment(input).zone();
      }

      return (this.zone() - input) % 60 === 0;
    },

    daysInMonth: function () {
      return daysInMonth(this.year(), this.month());
    },

    dayOfYear: function (input) {
      var dayOfYear = round((moment(this).startOf('day') - moment(this).startOf('year')) / 864e5) + 1;
      return input == null ? dayOfYear : this.add("d", (input - dayOfYear));
    },

    quarter: function () {
      return Math.ceil((this.month() + 1.0) / 3.0);
    },

    weekYear: function (input) {
      var year = weekOfYear(this, this.lang()._week.dow, this.lang()._week.doy).year;
      return input == null ? year : this.add("y", (input - year));
    },

    isoWeekYear: function (input) {
      var year = weekOfYear(this, 1, 4).year;
      return input == null ? year : this.add("y", (input - year));
    },

    week: function (input) {
      var week = this.lang().week(this);
      return input == null ? week : this.add("d", (input - week) * 7);
    },

    isoWeek: function (input) {
      var week = weekOfYear(this, 1, 4).week;
      return input == null ? week : this.add("d", (input - week) * 7);
    },

    weekday: function (input) {
      var weekday = (this.day() + 7 - this.lang()._week.dow) % 7;
      return input == null ? weekday : this.add("d", input - weekday);
    },

    isoWeekday: function (input) {
      // behaves the same as moment#day except
      // as a getter, returns 7 instead of 0 (1-7 range instead of 0-6)
      // as a setter, sunday should belong to the previous week.
      return input == null ? this.day() || 7 : this.day(this.day() % 7 ? input : input - 7);
    },

    get: function (units) {
      units = normalizeUnits(units);
      return this[units]();
    },

    set: function (units, value) {
      units = normalizeUnits(units);
      if (typeof this[units] === 'function') {
        this[units](value);
      }
      return this;
    },

    // If passed a language key, it will set the language for this
    // instance.  Otherwise, it will return the language configuration
    // variables for this instance.
    lang: function (key) {
      if (key === undefined) {
        return this._lang;
      } else {
        this._lang = getLangDefinition(key);
        return this;
      }
    }
  });

  // helper for adding shortcuts
  function makeGetterAndSetter(name, key) {
    moment.fn[name] = moment.fn[name + 's'] = function (input) {
      var utc = this._isUTC ? 'UTC' : '';
      if (input != null) {
        this._d['set' + utc + key](input);
        moment.updateOffset(this);
        return this;
      } else {
        return this._d['get' + utc + key]();
      }
    };
  }

  // loop through and add shortcuts (Month, Date, Hours, Minutes, Seconds, Milliseconds)
  for (i = 0; i < proxyGettersAndSetters.length; i++) {
    makeGetterAndSetter(proxyGettersAndSetters[i].toLowerCase().replace(/s$/, ''), proxyGettersAndSetters[i]);
  }

  // add shortcut for year (uses different syntax than the getter/setter 'year' == 'FullYear')
  makeGetterAndSetter('year', 'FullYear');

  // add plural methods
  moment.fn.days = moment.fn.day;
  moment.fn.months = moment.fn.month;
  moment.fn.weeks = moment.fn.week;
  moment.fn.isoWeeks = moment.fn.isoWeek;

  // add aliased format methods
  moment.fn.toJSON = moment.fn.toISOString;

  /************************************
   Duration Prototype
   ************************************/


  extend(moment.duration.fn = Duration.prototype, {

    _bubble: function () {
      var milliseconds = this._milliseconds,
        days = this._days,
        months = this._months,
        data = this._data,
        seconds, minutes, hours, years;

      // The following code bubbles up values, see the tests for
      // examples of what that means.
      data.milliseconds = milliseconds % 1000;

      seconds = absRound(milliseconds / 1000);
      data.seconds = seconds % 60;

      minutes = absRound(seconds / 60);
      data.minutes = minutes % 60;

      hours = absRound(minutes / 60);
      data.hours = hours % 24;

      days += absRound(hours / 24);
      data.days = days % 30;

      months += absRound(days / 30);
      data.months = months % 12;

      years = absRound(months / 12);
      data.years = years;
    },

    weeks: function () {
      return absRound(this.days() / 7);
    },

    valueOf: function () {
      return this._milliseconds +
        this._days * 864e5 +
        (this._months % 12) * 2592e6 +
        toInt(this._months / 12) * 31536e6;
    },

    humanize: function (withSuffix) {
      var difference = +this,
        output = relativeTime(difference, !withSuffix, this.lang());

      if (withSuffix) {
        output = this.lang().pastFuture(difference, output);
      }

      return this.lang().postformat(output);
    },

    add: function (input, val) {
      // supports only 2.0-style add(1, 's') or add(moment)
      var dur = moment.duration(input, val);

      this._milliseconds += dur._milliseconds;
      this._days += dur._days;
      this._months += dur._months;

      this._bubble();

      return this;
    },

    subtract: function (input, val) {
      var dur = moment.duration(input, val);

      this._milliseconds -= dur._milliseconds;
      this._days -= dur._days;
      this._months -= dur._months;

      this._bubble();

      return this;
    },

    get: function (units) {
      units = normalizeUnits(units);
      return this[units.toLowerCase() + 's']();
    },

    as: function (units) {
      units = normalizeUnits(units);
      return this['as' + units.charAt(0).toUpperCase() + units.slice(1) + 's']();
    },

    lang: moment.fn.lang,

    toIsoString: function () {
      // inspired by https://github.com/dordille/moment-isoduration/blob/master/moment.isoduration.js
      var years = Math.abs(this.years()),
        months = Math.abs(this.months()),
        days = Math.abs(this.days()),
        hours = Math.abs(this.hours()),
        minutes = Math.abs(this.minutes()),
        seconds = Math.abs(this.seconds() + this.milliseconds() / 1000);

      if (!this.asSeconds()) {
        // this is the same as C#'s (Noda) and python (isodate)...
        // but not other JS (goog.date)
        return 'P0D';
      }

      return (this.asSeconds() < 0 ? '-' : '') +
        'P' +
        (years ? years + 'Y' : '') +
        (months ? months + 'M' : '') +
        (days ? days + 'D' : '') +
        ((hours || minutes || seconds) ? 'T' : '') +
        (hours ? hours + 'H' : '') +
        (minutes ? minutes + 'M' : '') +
        (seconds ? seconds + 'S' : '');
    }
  });

  function makeDurationGetter(name) {
    moment.duration.fn[name] = function () {
      return this._data[name];
    };
  }

  function makeDurationAsGetter(name, factor) {
    moment.duration.fn['as' + name] = function () {
      return +this / factor;
    };
  }

  for (i in unitMillisecondFactors) {
    if (unitMillisecondFactors.hasOwnProperty(i)) {
      makeDurationAsGetter(i, unitMillisecondFactors[i]);
      makeDurationGetter(i.toLowerCase());
    }
  }

  makeDurationAsGetter('Weeks', 6048e5);
  moment.duration.fn.asMonths = function () {
    return (+this - this.years() * 31536e6) / 2592e6 + this.years() * 12;
  };


  /************************************
   Default Lang
   ************************************/


  // Set default language, other languages will inherit from English.
  moment.lang('en', {
    ordinal: function (number) {
      var b = number % 10,
        output = (toInt(number % 100 / 10) === 1) ? 'th' :
          (b === 1) ? 'st' :
            (b === 2) ? 'nd' :
              (b === 3) ? 'rd' : 'th';
      return number + output;
    }
  });

  /* EMBED_LANGUAGES */

  /************************************
   Exposing Moment
   ************************************/

  function makeGlobal(deprecate) {
    var warned = false, local_moment = moment;
    /*global ender:false */
    if (typeof ender !== 'undefined') {
      return;
    }
    // here, `this` means `window` in the browser, or `global` on the server
    // add `moment` as a global object via a string identifier,
    // for Closure Compiler "advanced" mode
    if (deprecate) {
      global.moment = function () {
        if (!warned && console && console.warn) {
          warned = true;
          console.warn(
            "Accessing Moment through the global scope is " +
            "deprecated, and will be removed in an upcoming " +
            "release.");
        }
        return local_moment.apply(null, arguments);
      };
      extend(global.moment, local_moment);
    } else {
      global['moment'] = moment;
    }
  }

  // CommonJS module is defined
  if (hasModule) {
    module.exports = moment;
    makeGlobal(true);
  } else if (typeof define === "function" && define.amd) {
    define("moment", function (require, exports, module) {
      if (module.config && module.config() && module.config().noGlobal !== true) {
        // If user provided noGlobal, he is aware of global
        makeGlobal(module.config().noGlobal === undefined);
      }

      return moment;
    });
  } else {
    makeGlobal();
  }
}).call(this);